Gaia has discovered three stellar mass black holes, each with a small stellar companion. For two of these systems the companions orbit closer that we would expect. Just how these systems form is a bit of a mysteries, but there are clues.
Gaia has discovered three stellar mass black holes, each with a small stellar companion. For two of these systems the companions orbit closer that we would expect. Just how these systems form is a bit of a mysteries, but there are clues.
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